Whoever wrote the weapon guide hasn't ever USED the pistol, the chainsaw is now useless against anyone that has played since launch, and any other melee attack is much better than the chainsaw because you aren't vulnerable right after you finish the chainsaw.
Example: Pistol whip is totally unrated, you whip twice they are DBNO (Down but not out) then you can either whip again or shoot. The thing most people don't notice is that the first time you whip someone you STUN THEM.
And for the Wii, I think the guy just wants to get his 5 mins of fame using a sharp stick on someone elses balloon. I'm happy with mine. He needs to check out bomberman '93, there is no tired arm and 5 player multiplayer. Take that angsty journalism!